<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../js/jquery-1.11.3.js"></script>
</head>
<body>
<div id="from">div的内容</div>
<div id="to"></div>
<script type="text/javascript">
    $("#to").html($("#from").html());
</script>
</body>
</html>